Bug 780530 - Notification after webapp uninstallation. r=mhommey

browser/locales/en-US/chrome/browser/browser.properties

@@ -358,6 +358,8 @@ webapps.install.accesskey = I
 #LOCALIZATION NOTE (webapps.requestInstall) %1$S is the web app name, %2$S is the site from which the web app is installed
 webapps.requestInstall = Do you want to install "%1$S" from this site (%2$S)?
 webapps.install.success = Application Installed
+# LOCALIZATION NOTE (webapps.uninstall.notification): %S will be replaced with the name of the uninstalled web app
+webapps.uninstall.notification = %S has been uninstalled from your computer.
 
 # Telemetry opt-out prompt for Aurora and Nightly
 # LOCALIZATION NOTE (telemetryOptOutPrompt): %1$S and %3$S will be replaced by

toolkit/webapps/WebappsInstaller.jsm

@@ -801,10 +801,13 @@ LinuxNativeApp.prototype = {
     let factory = Cc["@mozilla.org/xpcom/ini-processor-factory;1"]
                     .getService(Ci.nsIINIParserFactory);
 
+    let browserBundle = Services.strings.createBundle("chrome://browser/locale/browser.properties");
+
     // ${InstallDir}/webapp.ini
     let writer = factory.createINIParser(this.webappINI).QueryInterface(Ci.nsIINIParserWriter);
     writer.setString("Webapp", "Name", this.appName);
     writer.setString("Webapp", "Profile", this.uniqueName);
+    writer.setString("Webapp", "UninstallMsg", browserBundle.formatStringFromName("webapps.uninstall.notification", [this.appName], 1));
     writer.setString("WebappRT", "InstallDir", this.runtimeFolder.path);
     writer.writeFile();
 

webapprt/gtk2/webapprt.cpp

@@ -10,6 +10,7 @@
 // Linux headers
 #include <fcntl.h>
 #include <unistd.h>
+#include <dlfcn.h>
 
 // Mozilla headers
 #include "nsIFile.h"
@@ -224,7 +225,7 @@ void CopyAndRelaunch(const char* firefoxDir, const char* curExePath)
   ErrorDialog("Couldn't execute the new webapprt-stub executable");
 }
 
-void RemoveApplication(const char* curExeDir, const char* profile)  {
+void RemoveApplication(nsINIParser& parser, const char* curExeDir, const char* profile)  {
   if (!isProfileOverridden) {
     // Remove the desktop entry file.
     char desktopEntryFilePath[MAXPATHLEN];
@@ -257,6 +258,47 @@ void RemoveApplication(const char* curExeDir, const char* profile)  {
   char iconPath[MAXPATHLEN];
   snprintf(iconPath, MAXPATHLEN, "%s/icon.png", curExeDir);
   unlink(iconPath);
+
+  char appName[MAXPATHLEN];
+  if (NS_FAILED(parser.GetString("Webapp", "Name", appName, MAXPATHLEN))) {
+    strcpy(appName, profile);
+  }
+
+  char uninstallMsg[MAXPATHLEN];
+  if (NS_SUCCEEDED(parser.GetString("Webapp", "UninstallMsg", uninstallMsg, MAXPATHLEN))) {
+    /**
+     * The only difference between libnotify.so.4 and libnotify.so.1 for these symbols
+     * is that notify_notification_new takes three arguments in libnotify.so.4 and
+     * four in libnotify.so.1.
+     * Passing the fourth argument as NULL is binary compatible.
+     */
+    typedef void  (*notify_init_t)(char*);
+    typedef void* (*notify_notification_new_t)(char*, char*, char*, char*);
+    typedef void  (*notify_notification_show_t)(void*, char*);
+
+    void *handle = dlopen("libnotify.so.4", RTLD_LAZY);
+    if (!handle) {
+      handle = dlopen("libnotify.so.1", RTLD_LAZY);
+      if (!handle)
+        return;
+    }
+
+    notify_init_t nn_init = (notify_init_t)dlsym(handle, "notify_init");
+    notify_notification_new_t nn_new = (notify_notification_new_t)dlsym(handle, "notify_notification_new");
+    notify_notification_show_t nn_show = (notify_notification_show_t)dlsym(handle, "notify_notification_show");
+    if (!nn_init || !nn_new || !nn_show) {
+      dlclose(handle);
+      return;
+    }
+
+    nn_init(appName);
+
+    void* n = nn_new(uninstallMsg, NULL, "dialog-information", NULL);
+
+    nn_show(n, NULL);
+
+    dlclose(handle);
+  }
 }
 
 int main(int argc, char *argv[])
@@ -319,7 +361,7 @@ int main(int argc, char *argv[])
   }
 
   if (removeApp) {
-    RemoveApplication(curExeDir, profile);
+    RemoveApplication(parser, curExeDir, profile);
     return 0;
   }